What's CLASSIFIED?
The Big Bang Theory Season 2, Episode 22
It's full of CLASSIFIED information
about the Air Force project.
The Big Bang Theory Season 10, Episode 20
It's CLASSIFIED.
If we tell anyone we'd get in trouble.
The Big Bang Theory Season 10, Episode 15
That's CLASSIFIED.
The Big Bang Theory Season 2, Episode 22
Oh, the project is CLASSIFIED,
I can't tell you.
The Big Bang Theory Season 10, Episode 19